When little kids are totally into bugs and critters, it's fun to make a caterpillar cake out of cupcakes - you can use greenish frosting (or any color), and line the cupcakes up on a board (covered in foil) or a really large tray. Put them in a curvy pattern, like a caterpillar in motion. Add "legs" out of string licorice, use M&Ms or gumdrops or other candies for spots, use pretzel sticks or thick licorice or even tootsie roll pops for antennas, etc. YOu can also bake cake mix in flat-bottomed ice cream cones (filled about half full), and then let the kids decorate their own hand-held cupcakes. Have fun!